I am wondering if there are any non poisoning alternatives to sodium acetate, which is used in those self-heating pads, that reaction can be kicked off by clicking a small metal plate?
Specifically alternatives that are able to become hotter than sodium acetate. Meaning something that can store more energy and therefor emit more or longer heat.
If I correctly understand the Wikipedia article then the correct term would be the
specific heat capacity.
Are there other ways to start the reaction than clicking a small metal plate? Like using a battery?